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Re: You tube F14 cat sailing [Re: papayamon2] #143097
06/17/08 07:59 PM
06/17/08 07:59 PM
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South Australia
Darryl_Barrett Offline OP
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Darryl_Barrett  Offline OP
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Isn't it also Cyclone season in Florida as well?

-- Have You Seen This? --
Re: You tube F14 cat sailing [Re: Darryl_Barrett] #143098
06/18/08 07:09 AM
06/18/08 07:09 AM
Joined: Sep 2007
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japan
erice Offline
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japan
Darryl, the pics show some sexy looking kick up rudders on some/earlier? f14's as well as the t-foil rudders.

notice that the t-foil rudders are not kick up but have their own special up/down carbon sleeves

is that because the upward forces they generate don't work well with the typical kickup system, or are you just trying to keep the t-foils at the lowest drag angle all the time. i can imagine that if the rudders were put up or down the usual way the t-foils would act as huge brakes....


eric e
1982 nacra 5.2 - 2158
2009 weta tri - 294
Re: You tube F14 cat sailing [Re: Darryl_Barrett] #143099
06/18/08 06:22 PM
06/18/08 06:22 PM
Joined: May 2006
Posts: 1,383
Kingston SE South Australia
JeffS Offline
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Quote
Isn't it also Cyclone season in Florida as well?

At least theres wind, I thought about Christies this weekend but its looking like no wind again <img src="http://www.catsailor.com/forums/images/graemlins/confused.gif" alt="" />


Jeff Southall
Current boats
Nacra 5.8 1703 Animal Scanning Services
Nacra 5.8 1667 Ram Raider
Nacra 18 Square
Arrow 1576
Re: You tube F14 cat sailing [Re: erice] #143100
06/19/08 12:26 AM
06/19/08 12:26 AM
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Posts: 322
South Australia
Marcus F16 Offline
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South Australia
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i can imagine that if the rudders were put up or down the usual way the t-foils would act as huge brakes....


I think you answered you own question, plus I think you would break something while "kicking" the rudders up - unless you are not moving. <img src="http://www.catsailor.com/forums/images/graemlins/smirk.gif" alt="" />


Marcus Towell

Formula Catamarans Aust Pty Ltd
Re: You tube F14 cat sailing [Re: erice] #143101
06/19/08 12:42 AM
06/19/08 12:42 AM
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Posts: 1,012
South Australia
Darryl_Barrett Offline OP
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South Australia
(Quote)
Darryl, the pics show some sexy looking kick up rudders on some/earlier? F14’s as well as the t-foil rudders.
Notice that the t-foil rudders are not kick up but have their own special up/down carbon sleeves
Is that because the upward forces they generate don't work well with the typical kick up system, or are you just trying to keep the t-foils at the lowest drag angle all the time? I can imagine that if the rudders were put up or down the usual way the t-foils would act as huge brakes....
(End Quote)

The kick up system we made first and when we fitted the T foils it seemed a better idea to be able to raise and lower the T foils always at the same angle of attack to the direction of the boat and not, as you say, create a braking effect if they were to kick up. (I have tried them with a kick up system (the T foils) and they do work well and the braking effect was of no great inconvenience except if I tried to sail off the beach with the rudders partly swung up).
I thought that you were looking at your own T foil system? (or was that someone else?)

Re: You tube F14 cat sailing [Re: Darryl_Barrett] #143102
06/19/08 06:26 PM
06/19/08 06:26 PM
Joined: Oct 2006
Posts: 119
Bernhards Bay, N.Y.
popeyez7 Offline
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Bernhards Bay, N.Y.
I showed the video to one of my friends... He wants one also, make 2 boxes...LOL... I didn't realize at first that you were one of the designers & builders~~ Good job <img src="http://www.catsailor.com/forums/images/graemlins/wink.gif" alt="" /> and another bump !!!!!! <img src="http://www.catsailor.com/forums/images/graemlins/grin.gif" alt="" />


~~Don't fear the ''SPEED''~~ Fear the''ADDICTION''
~17,18 Hobies,
~Jet boat~Speedster 150
~2 Kayaks~
~~~~VIETNAM VET. 69-71~~~~
Re: You tube F14 cat sailing [Re: Darryl_Barrett] #143103
06/21/08 03:52 AM
06/21/08 03:52 AM
Joined: May 2006
Posts: 1,383
Kingston SE South Australia
JeffS Offline
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Kingston SE South Australia
Darryl wouldn't the foils kick up clear of the water and drag on top with very lttle resistance once they'd popped.
regards


Jeff Southall
Current boats
Nacra 5.8 1703 Animal Scanning Services
Nacra 5.8 1667 Ram Raider
Nacra 18 Square
Arrow 1576
Re: You tube F14 cat sailing [Re: JeffS] #143104
06/23/08 09:20 PM
06/23/08 09:20 PM
Joined: Feb 2004
Posts: 1,012
South Australia
Darryl_Barrett Offline OP
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South Australia
Your absolutely correct "Jeffs" and at most times when the rudders “kick up” you are not really concerned about your sailing speed as it’s mostly about saving your rudders from breakage from hitting something “solid”. Even if they kick up from dragging large amounts of weed, you still want them up to get that weed off of them. As I said the only time that having T foils on “kick up” rudders is a real “pain” is when you have to sail out off the beach with them half way up/down, then there is a lot of drag that can be problematic.
With the T foils in “cassette” type stocks everything works great all the time, with the possible exception of hitting something really solid with them down – but then we have used them now for some three plus seasons and never broken any while sailing (and they have hit bottom rather hard a few times)

Re: You tube F14 cat sailing [Re: Darryl_Barrett] #143105
06/24/08 02:14 AM
06/24/08 02:14 AM
Joined: Jun 2006
Posts: 431
Netherlands
DennisMe Offline
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Netherlands
There's a Farrier trimaran with pull-up rudders in a cassette. Normally you pull them straight up manually, but if you hit something the whole cassette kicks up, saving the rudders. That sounds like the ideal setup to me! Too bad it won't work for daggerboards! Could be nice on the F14, but maybe it would put too much weight on the transom?

Re: You tube F14 cat sailing [Re: DennisMe] #143106
06/25/08 07:44 PM
06/25/08 07:44 PM
Joined: Feb 2004
Posts: 1,012
South Australia
Darryl_Barrett Offline OP
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South Australia
(Quote)
There's a Farrier trimaran with pull-up rudders in a cassette. Normally you pull them straight up manually, but if you hit something the whole cassette kicks up, saving the rudders. That sounds like the ideal set-up to me! Too bad it won't work for daggerboards! Could be nice on the F14, but maybe it would put too much weight on the transom? (End quote)

There is a 14’ cat (paper tiger) here that has/had such a “kick up” cassette rudder stock system, and we have looked at that system but then decided to keep it as simple as possible. We have had no problems so far with this cassette system even without any kick up ability.

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